This is what can happen when you ask your 8yo to switch his laundry (remove pants from dryer and move clothes from washer to dryer and start it). Keep in mind he’s successfully done this before.
You will notice that in addition to all the socks that never even made it into the dryer, the dryer door isn’t. even. shut. (so it never turned on). Yet he did remember to turn the dryer to permanent press and put in a dryer sheet.